1. Department of Epidemiology and Biostatistics College of Public Health Zhengzhou University Zhengzhou China
2. Cardiovascular Department Zhengzhou Yihe Hospital Zhengzhou China
3. Department of Biostatistics and Epidemiology School of Public Health Shenzhen University Health Science Center Shenzhen China
4. Department of Social Medicine and Health Service Management College of Public Health Zhengzhou University Zhengzhou China